6440149958 has 8 divisors (see below), whose sum is σ = 10538427240. Its totient is φ = 2927340880.

The previous prime is 6440149931. The next prime is 6440149999. The reversal of 6440149958 is 8599410446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146367023 + ... + 146367066.

It is an arithmetic number, because the mean of its divisors is an integer number (1317303405).

Almost surely, 2^6440149958 is an apocalyptic number.

6440149958 is a deficient number, since it is larger than the sum of its proper divisors (4098277282).

6440149958 is a wasteful number, since it uses less digits than its factorization.

6440149958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292734102.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 6440149958 is about 80250.5449078073. The cubic root of 6440149958 is about 1860.5099343742.

The spelling of 6440149958 in words is "six billion, four hundred forty million, one hundred forty-nine thousand, nine hundred fifty-eight".